A helmet apparatus permitted duration, peak velocity, and peak acceleration measurements as functions of magnitude of horizontal head rotation; these "main sequence" data give evidence for multipulse-step neurological signals appropriate for time optimal control of head rotation similar to those of saccadic eye movements.
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Biomimetics (Basel)
December 2024
School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China.
Birds use their claws to perch on branches, which helps them to recover energy and observe their surroundings; however, most biomimetic flapping-wing aircraft can only fly, not perch. This study was conducted on the basis of bionic principles to replicate birds' claw and wing movements in order to design a highly biomimetic flapping-wing aircraft capable of perching. First, a posture conversion module with a multi-motor hemispherical gear structure allows the aircraft to flap, twist, swing, and transition between its folded and unfolded states.
View Article and Find Full Text PDFFront Neurol
December 2024
Institut de Recherche Oto-Neurologique (IRON), Paris, France.
Introduction: While most head movements in daily life are active, most tools used to assess vestibular deficits rely on passive head movements. A single gain value is not sufficient to quantify gaze stabilization efficiency during active movements in vestibular deficit patients. Moreover, during active gaze shifts, anticipatory mechanisms come into play.
View Article and Find Full Text PDFClin Anat
December 2024
Division of Gross and Clinical Anatomy, Department of Anatomy, Kurume University School of Medicine, Fukuoka, Japan.
Shoulder pain often involves the tendon of the long head of the biceps brachii (LHBT) and the transverse humeral ligament (THL). Traditionally, the THL is considered a ligament that prevents the LHBT from dislocating, but recent studies suggest that it may be part of the subscapularis tendon. This review evaluates the nature of the THL and its overlying structures.
View Article and Find Full Text PDFFront Endocrinol (Lausanne)
December 2024
Department of Endocrine Surgery, University College London Hospital, London, United Kingdom.
Background: Surgery is the preferred treatment for primary hyperparathyroidism. Minimally invasive parathyroidectomy is only feasible with accurate preoperative localisation. Virtual 3D anatomical models can be constructed from patient-specific CT scans using segmentation software.
View Article and Find Full Text PDFJ Shoulder Elbow Surg
December 2024
Shoulder and Elbow Division, Sports Medicine Institute, Hospital for Special Surgery, New York, NY, USA.
Background: Patients undergoing reverse shoulder arthroplasty (RSA) for rotator cuff arthropathy may present with an external rotation (ER) lag due to posterior rotator cuff insufficiency. As a result, the addition of a latissimus dorsi (LD) tendon transfer in combination with RSA has become increasingly utilized. Initial descriptions of LD tendon transfer involved rerouting of the LD tendon posterior to the long head of the triceps tendon.
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